GT630 / GK208 25watt tdp - AVS Forum
Home Theater Computers > GT630 / GK208 25watt tdp
dheiskel's Avatar dheiskel 08:41 PM 08-26-2013
Has anyone used one of the new Nvidia GT630 cards based upon the gk208 chip. It appears to be the lowest power graphics card with a lot of chip capabilities. I haven't found any reviews concentrating on htpc's. If anyone has further insights into how suitable it is for madvr etc. please chime in?

I don't want to start an argument about intel hd4000 etc. being good enough, for the sake of discussion assume it isn't.

renethx's Avatar renethx 10:08 PM 08-26-2013
GeForce GT 630 Kepler (GK208) has very limited memory bandwidth (because of 64-bit data path with DDR3; 128-bit or higher is common). Compare GFLOPS and memory bandwidth (the two most important factors for madVR performance):

GeForce GT 630 Kepler (GK208): 693 GFLOPS / 14.4 GB/s
GeForce GT 640 (GK107): 691 GFLOPS / 28.5 GB/s
GeForce GT 640 GDDR5 (GK208): 803 GFLOPS / 40.0 GB/s
GeForce GTX 650 (GK107): 813 GFLOPS / 80.0 GB/s
GeForce GTX 650 Ti (GK106): 1421 GFLOPS / 86.4 GB/s

GT 640 (GK107) can do madVR Level 5 for movies with GPU load < 60% and Level 3 for videos with GPU load < 60%. (The power consumption of the total system at video playback is ~70W, not that bad.) GT 630 Kepler (GK208) is worse than that.
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